OPERATORS · RRC 878403 · P-5 STATUS Y
Unocal Expl Corp
Houston, TX
Watch this operatorUnocal Expl Corp has filed no drilling permits in the past 12 months; its most recent permit was issued July 28, 1992.
The RRC wellbore file lists 1 well under its operatorship.
66 drilling permits have been issued to this operator number since 1990; its P-5 organization report was last filed May 7, 1993.
- 0
- permits, last 12 months
- —
- vs prior 12 months (0)
- 0
- counties, 12 months
- 0
- producing wells, of 1 of record
- 0
- leases it reports
- —
- horizontal, 12 months
WINDOWS ON THE RRC ISSUE DATE · COMPUTED OCT 29, 2026
From permit to spud
FROM THE DATES ON ITS W-1 PERMITS · ALL TIME
A permit is a plan, not a well. These figures count only permits old enough to have spudded, six months and more, and read the spud, cancel, and expiry dates the RRC records on each one.
- 82%
- spud rate · 54 of 66 mature permits
- 24
- median days permit to spud · middle half 12–44
- 0
- spuds, last 180 days
- 0%
- cancelled · 0 permits
- 12
- expired undrilled
- 33
- permits a year over 2 active years
Where
Counties by permits in the last 12 months, with all-time permits and current wells of record there.
| County | 12 mo | All time | Wells | Last |
|---|---|---|---|---|
| Van Zandt county → | — | 55 | 0 | Jul 28, 1992 |
| Jackson county → | — | 3 | 1 | Apr 30, 1991 |
| Houston county → | — | 2 | 0 | Mar 16, 1992 |
| Orange county → | — | 2 | 0 | Oct 21, 1991 |
| Rains county → | — | 2 | 0 | Jun 25, 1991 |
| Henderson county → | — | 1 | 0 | Jun 10, 1991 |
| Limestone county → | — | 1 | 0 | Mar 18, 1991 |
All 66 permits, searchable → · Leases it reports → · On the map →
Formations in its completed wells
Tops reported on completion filings for wells it operates. RRC wellbore file. About tops →
| Formation | Wells | Permitted last 3 yrs |
|---|---|---|
| Austin Chalk | 52 | 2 |
| Pecan Gap | 50 | 2 |
| Nacatoch | 39 | 1 |
| Woodbine | 12 | 2 |
| Navarro | 5 | 1 |
| Cotton Valley | 2 | 0 |
| Frio | 2 | 0 |
| Buda | 1 | 0 |
| Eagle Ford | 1 | 0 |
| Paluxy | 1 | 0 |
| Rodessa | 1 | 0 |
| Pettit | 1 | 0 |
| Travis Peak | 1 | 0 |
| Smackover | 1 | 0 |
| Wilcox | 1 | 0 |
Production by month
PDQ LEASE REPORTS · REPORTED THROUGH APR 2026
Barrels on leases where this operator filed the production report. Lease-level by design; the latest months are revised upward as late reports arrive. How production is reported →
- 0
- bbl oil, last 12 reported months
- —
- vs the 12 months before
- 0
- mcf gas incl. casinghead, last 12
- 0
- bbl oil since reporting began
No lease production reported under this operator number in the last three years.
Beyond the permit record
RRC wellbore file
Wells of record
- 1
- on the schedule
- 0
- producing
- 0
- shut in
- 0
- injection
- 0
- temp. abandoned
- 1
- plugged
How it got them
- 0
- permitted itself
- 1
- acquired from others
- 40
- permitted, now run by others
Acquired means the well's permit names a different operator than the schedule does today. Transfers and operator numbers →
RRC UIC permits · H-10 reported volumes
Disposal and injection
- 0
- active UIC permits of 40
- 0
- permitted bbl/day, active
- 0
- bbl injected, last 12 reported months
- Jun 2025
- reported through
Permitted volume is a ceiling, not throughput. How to read it →
Permit types
Last 12 months against the prior 12, and all time. A type opens the permit history filtered to it. What the types mean →
| Type | 12 mo | Prior 12 | All time |
|---|---|---|---|
| Drill | 0 | 0 | 52 |
| Recompletion | 0 | 0 | 14 |
Fields
RRC regulatory fields with the most wells of record under this operator. The field opens its page; the count opens this operator's wells in it.
| Field | Wells | Producing |
|---|---|---|
| Ganado West (4700 Zone)33898123 | 1 | 0 |
P-5 organization report
As registered with the RRC. About the P-5 →
- Registration
- Status code Y
- Last filed May 7, 1993
- Address
- PO Box 4551 Attn:dh Richardson
- Houston, TX 77210
- Officers and agents
- Stegemeier, R. J. · Chairman
- Maxwell, H. D. · President/Ceo
- Brinegar, C. S. · Vice President/Cfo
Latest permits
NEWEST FIRST BY ISSUE DATE · FILED OR ON WELLS IT NOW OPERATES
About this data
Registration from the RRC P-5 organization report, refreshed weekly. Permits from the OGA049M master and daily daf420 files; wells of record from the EWA wellbore schedule; production from PDQ lease reports at the last vintage; disposal from UIC permits and H-10 reports. Summary figures are rebuilt nightly.
Developers: this page as JSON is GET /v1/data/operators/tx/878403, documented in the API reference.